Pi

Pi is one of Z.E.N.'s three built-in providers, alongside Claude and Codex. You can use Pi to run any node, set it as your workflow default, or mix it into a workflow that uses different providers per step.

Use Pi for a single node

nodes:
  - id: summarize
    type: prompt
    provider: pi
    model: pi-default
    prompt: |
      Summarize the morning Slack into a five-bullet brief.

The provider: pi field tells Z.E.N. which provider to call for this node. Everything else (variables, dependencies, output capture) works the same as any other prompt node.

Use Pi as your default

In ~/.zen/config.yaml:

assistants:
  default: pi
  pi:
    model: pi-default

Every node that doesn't override provider: will use Pi. Override on the nodes where you specifically want Claude or Codex.

Configuration

Pi reads its credentials from the standard provider config block. The shared shape (model selection, additional directories, setting sources) is in Configuration. Same fields apply.

What you can do with Pi

Anything you'd do with Claude or Codex. Run a single node with Pi as the provider, set it as your default, or mix it across a workflow when one step is better suited to Pi than the others. The provider sits behind the same node interface as the rest.